This isn’t the first time he’s demonstrated infrared cooling, but the previous demonstration used Barium Sulfate microspheres. The process of making those microspheres is a bit beyond the ...

and near-edge X-ray Absorption Fine Structure (NEXAFS), the researchers analyzed carbonaceous particles found in rocks made of barium sulfate. This enabled scientists to obtain important ...

Explain why, in a test for sulfate ions, the sample is acidified with hydrochloric acid first. Carbonate ions also produce a white precipitate with barium chloride solution. The acid reacts with ...